Blocking Sets Of External Lines To A Conic In PG(2, q), q ODD

@article{Aguglia2006BlockingSO,
  title={Blocking Sets Of External Lines To A Conic In PG(2, q), q ODD},
  author={Angela Aguglia and G{\'a}bor Korchm{\'a}ros},
  journal={Combinatorica},
  year={2006},
  volume={26},
  pages={379-394}
}
We determine all point-sets of minimum size in PG(2, q), q odd that meet every external line to a conic in PG(2, q). The proof uses a result on the linear system of polynomials vanishing at every internal point to the conic and a corollary to the classification theorem of all subgroups of PGL(2, q).